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A151823
as a simple table
n
a(n)
1
0
2
1
3
2
4
9
5
30
6
213
7
1757
8
22956
9
955569
10
1853259264
[0,1,2,9,30,213,1757,22956,955569,1853259264]
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Last modified July 16 17:03 EDT 2024. Contains 374358 sequences. (Running on oeis4.)